mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.1 KiB
72 lines
2.1 KiB
/* |
|
* Copyright (C) 2015 Pedro Arthur <bygrandao@gmail.com> |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU Lesser General Public |
|
* License as published by the Free Software Foundation; either |
|
* version 2.1 of the License, or (at your option) any later version. |
|
* |
|
* FFmpeg is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* Lesser General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Lesser General Public |
|
* License along with FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "swscale_internal.h" |
|
|
|
typedef struct GammaContext |
|
{ |
|
uint16_t *table; |
|
} GammaContext; |
|
|
|
// gamma_convert expects 16 bit rgb format |
|
// it writes directly in src slice thus it must be modifiable (done through cascade context) |
|
static int gamma_convert(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH) |
|
{ |
|
GammaContext *instance = desc->instance; |
|
uint16_t *table = instance->table; |
|
int srcW = desc->src->width; |
|
|
|
int i; |
|
for (i = 0; i < sliceH; ++i) { |
|
uint8_t ** src = desc->src->plane[0].line; |
|
int src_pos = sliceY+i - desc->src->plane[0].sliceY; |
|
|
|
uint16_t *src1 = (uint16_t*)*(src+src_pos); |
|
int j; |
|
for (j = 0; j < srcW; ++j) { |
|
uint16_t r = AV_RL16(src1 + j*4 + 0); |
|
uint16_t g = AV_RL16(src1 + j*4 + 1); |
|
uint16_t b = AV_RL16(src1 + j*4 + 2); |
|
|
|
AV_WL16(src1 + j*4 + 0, table[r]); |
|
AV_WL16(src1 + j*4 + 1, table[g]); |
|
AV_WL16(src1 + j*4 + 2, table[b]); |
|
} |
|
|
|
} |
|
return sliceH; |
|
} |
|
|
|
|
|
int ff_init_gamma_convert(SwsFilterDescriptor *desc, SwsSlice * src, uint16_t *table) |
|
{ |
|
GammaContext *li = av_malloc(sizeof(GammaContext)); |
|
if (!li) |
|
return AVERROR(ENOMEM); |
|
li->table = table; |
|
|
|
desc->instance = li; |
|
desc->src = src; |
|
desc->dst = NULL; |
|
desc->process = &gamma_convert; |
|
|
|
return 0; |
|
} |
|
|
|
|